/**
 * @project spring-threadpool-async
 * @description
 * @errorcode SystemException</ br>
 * @author 2022 14:43 huzhengyang Create 1.0 <br>
 * @copyright ©2022-2023
 */

package com.teradata.async.config;

import com.teradata.async.core.VisiableThreadPoolTaskExecutor;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

//@Component
//@ConfigurationProperties(prefix = "task.pool")
@Configuration
@EnableAsync
@Data
@Slf4j
public class TaskThreadPoolConfig {
    /*private int corePoolSize;
    private int maxPoolSize;
    private int keepAliveSeconds;
    private int queueCapacity;*/

    @Value("${task.pool.corePoolSize}")
    private int corePoolSize;
    @Value("${task.pool.maxPoolSize}")
    private int maxPoolSize;
    @Value("${task.pool.queueCapacity}")
    private int queueCapacity;
    @Value("${task.pool.keepAliveSeconds}")
    private int keepAliveSeconds;

    /* GetAndSet方法 */

    @Bean(name = "asyncServiceExecutor")
    public Executor asyncServiceExecutor() {
        log.info("start asyncServiceExecutor");
//        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        ThreadPoolTaskExecutor executor = new VisiableThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(corePoolSize);
        //配置最大线程数
        executor.setMaxPoolSize(maxPoolSize);
        //配置队列大小
        executor.setQueueCapacity(queueCapacity);
        //配置
        executor.setKeepAliveSeconds(keepAliveSeconds);
        //配置线程池中的线程的名称前缀  也可以从yml配置读取
        executor.setThreadNamePrefix("myExecutor-");

        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //执行初始化
        executor.initialize();
        return executor;
    }
}
